Improvements to JavaScript analysis

General improvements

Support for the following frameworks and libraries has been improved:
- firebase
The call graph has been improved to resolve method calls in more cases. This may produce more security alerts.

Query	Tags	Purpose

Query	Expected impact	Change
Client-side cross-site scripting (`js/xss`)	More results	More potential vulnerabilities involving functions that manipulate DOM attributes are now recognized.
Prototype pollution (`js/prototype-pollution`)	More results	The query now highlights vulnerable uses of jQuery and Angular, and the results are shown on LGTM by default.
Incorrect suffix check (`js/incorrect-suffix-check`)	Fewer false-positive results	The query recognizes valid checks in more cases.